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Sung-Min Park
Department of Electronic and Electrical Engineering, Hongik University, Sejong-ro 2639, Jochiwon-eup, Sejong 30016, Korea

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Journal article
Published: 03 September 2020 in Electronics
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This paper proposes a fault-detection method for open-switch failures in hybrid active neutral-point-clamped (HANPC) rectifiers. The basic HANPC topology comprises two SiC-based metal-oxide-semiconductor field-effect transistors (MOSFETs) and four Si insulated-gate bipolar transistors (IGBTs). A three-phase rectifier system using the HANPC topology can produce higher efficiency and lower current harmonics. An open-switch fault in a HANPC rectifier can be a MOSFET or IGBT fault. In this work, faulty cases of six different switches are analyzed based on the current distortion in the stationary reference frame. Open faults in MOSFET switches cause immediate and remarkable current distortions, whereas, open faults in IGBT switches are difficult to detect using conventional methods. To detect an IGBT fault, the proposed detection method utilizes some of the reactive power in a certain period to make an important difference, using the direct-quadrant (dq)-axis current information derived from the three-phase current. Thus, the proposed detection method is based on three-phase current measurements and does not use additional hardware. By analyzing the individual characteristics of each switch failure, the failed switch can be located exactly. The effectiveness and feasibility of the proposed fault-detection method are verified through PSIM simulations and experimental results.

ACS Style

Sang-Hun Kim; Seok-Min Kim; Sungmin Park; Kyo-Beum Lee. Switch Open-Fault Detection for a Three-Phase Hybrid Active Neutral-Point-Clamped Rectifier. Electronics 2020, 9, 1437 .

AMA Style

Sang-Hun Kim, Seok-Min Kim, Sungmin Park, Kyo-Beum Lee. Switch Open-Fault Detection for a Three-Phase Hybrid Active Neutral-Point-Clamped Rectifier. Electronics. 2020; 9 (9):1437.

Chicago/Turabian Style

Sang-Hun Kim; Seok-Min Kim; Sungmin Park; Kyo-Beum Lee. 2020. "Switch Open-Fault Detection for a Three-Phase Hybrid Active Neutral-Point-Clamped Rectifier." Electronics 9, no. 9: 1437.

Original article
Published: 24 August 2020 in Journal of Power Electronics
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Active power decoupling circuits have emerged to eliminate the inherent ripple power at twice the grid frequency in single-phase power electronics systems. However, this requires additional passive components and power switches, which increases the cost and volume of the system. This paper proposes a circuit configuration in an electric vehicle system to build power decoupling circuits that employ a reduced number of extra components. In this proposed circuit configuration, three inductors and six switching devices from the motor and the inverter circuit are used to build active power decoupling circuits during battery charging time. In addition, this paper proposes a robust voltage control method with a virtual d–q current controller and the interleaved pulse width modulation technique. The proposed system and its control method can improve control performance and achieve low-cost battery chargers with a high power density. MATLAB–Simulink simulations and experimental verifications based on hardware-in-the-loop-simulations and rapid-control-prototyping systems are performed to verify the effectiveness of the proposed system and control algorithm.

ACS Style

Dong-Hee Kim; Sung-Min Park. Power decoupling method with robust voltage control strategy for electric vehicle applications. Journal of Power Electronics 2020, 20, 1352 -1363.

AMA Style

Dong-Hee Kim, Sung-Min Park. Power decoupling method with robust voltage control strategy for electric vehicle applications. Journal of Power Electronics. 2020; 20 (6):1352-1363.

Chicago/Turabian Style

Dong-Hee Kim; Sung-Min Park. 2020. "Power decoupling method with robust voltage control strategy for electric vehicle applications." Journal of Power Electronics 20, no. 6: 1352-1363.

Journal article
Published: 18 May 2019 in Energies
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This paper presents a methodology to design and utilize a supervisory controller for networked power converters in residential applications. Wireless networks have been interfaced to multiple power factor correction (PFC) converters which are proposed to support reactive power. Unregulated reactive power support from PFC converters could cause reactive power deficiency and instability. Therefore, a supervisory controller is necessary to govern the operation of PFC converters. WiFi and WirelessHART networks have been used to implement the supervisory controller. Different nodes of the power network are connected by wireless communication links to the supervisory controller. Asynchronous communication links latency and uncertain states affect the control and response of the PFC converters. To overcome these issues, the supervisory controller design method has been proposed based on the system identification and the Ziegler-Nichols rule. The proposed supervisory controller has been validated by using a hardware-in-the-loop (HIL) test bed. The HIL testbed consisted of an OP4510 simulator, a server computer, Texas Instrument-Digital Signal Controllers (TI-DSCs), WiFi and WirelessHART modules. Experimental results show that the proposed supervisory controller can help to support and govern reactive power flow in a residential power network. The proposed method of controller design will be useful for different small-scale power and wireless network integration.

ACS Style

S. M. Rakiul Islam; Sung-Yeul Park; Shaobo Zheng; Song Han; Sung-Min Park. Supervisory Control for Wireless Networked Power Converters in Residential Applications. Energies 2019, 12, 1911 .

AMA Style

S. M. Rakiul Islam, Sung-Yeul Park, Shaobo Zheng, Song Han, Sung-Min Park. Supervisory Control for Wireless Networked Power Converters in Residential Applications. Energies. 2019; 12 (10):1911.

Chicago/Turabian Style

S. M. Rakiul Islam; Sung-Yeul Park; Shaobo Zheng; Song Han; Sung-Min Park. 2019. "Supervisory Control for Wireless Networked Power Converters in Residential Applications." Energies 12, no. 10: 1911.

Journal article
Published: 31 March 2017 in Energies
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This paper presents a time-efficient modeling and simulation strategy for aggregated microinverters in large-scale photovoltaic systems. As photovoltaic microinverter systems are typically comprised of multiple power electronic converters, a suitable modeling and simulation strategy that can be used for rapid prototyping is required. Dynamic models incorporating switching action may induce significant computational burdens and long simulation durations. This paper introduces a single-matrix-form approach using the average model of a basic microinverter with two power stages consisting of a dc-dc and dc-ac converter. The proposed methodology using a common or intermediate source between two average models of cascaded converters to find the overall average model is introduced and is applicable to many other converter topologies and combinations. It provides better flexibility and simplicity when investigating various power topologies in system-level studies of microinverter and other power electronic systems. A 200 W prototype microinverter is tested to verify the proposed average and dynamic models. Furthermore, MATLAB/Simulink (2010a, Mathworks, Natick, MA, USA) is used to show the improved simulation speed and maintained accuracy of the multiple microinverter configurations when the derived average model is compared to a dynamic switching simulation model.

ACS Style

Sungmin Park; Weiqiang Chen; Ali M. Bazzi; Sung-Yeul Park. A Time-Efficient Approach for Modelling and Simulation of Aggregated Multiple Photovoltaic Microinverters. Energies 2017, 10, 465 .

AMA Style

Sungmin Park, Weiqiang Chen, Ali M. Bazzi, Sung-Yeul Park. A Time-Efficient Approach for Modelling and Simulation of Aggregated Multiple Photovoltaic Microinverters. Energies. 2017; 10 (4):465.

Chicago/Turabian Style

Sungmin Park; Weiqiang Chen; Ali M. Bazzi; Sung-Yeul Park. 2017. "A Time-Efficient Approach for Modelling and Simulation of Aggregated Multiple Photovoltaic Microinverters." Energies 10, no. 4: 465.

Conference paper
Published: 01 September 2016 in 2016 IEEE Energy Conversion Congress and Exposition (ECCE)
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Multiple unit of PFC converters can be utilized for better power quality in the residential applications. It is important to set proper amount of reactive power contribution from each unit of PFC converter to reduce power loss and increase stability. To set the referenced amount of reactive power contribution for each PFC converter, a dynamic supervisory controller is necessary. In this paper, a wireless based supervisory controller is introduced to mitigate the problem. Multiple unit of unidirectional bridgeless ac-dc boost PFC converters were used as reactive power resources in a smart home application. The supervisory controller is comprised of a discrete Proportional-Integral controller and distributor which sets the reactive power references for each PFC converter. The controller was designed based on the systems identification method. The controller was designed and simulated considering different communication delays. In the ideal condition, the system had no communication delay. However, actual practical system had some reasonable delay. The effect of the use of supervisory controller was observed for dynamic load changing conditions. The simulation was done by using SIMULINK. Reactive power consumption from grid becomes 0VAR within 0.25 second for ideal condition. However, for the actual condition this become 9.35 seconds.

ACS Style

S.M. Rakiul Islam; Shawn Maxwell; Kamal Hossain; Sung-Yeul Park; Sungmin Park. Reactive power distribution strategy using power factor correction converters for smart home application. 2016 IEEE Energy Conversion Congress and Exposition (ECCE) 2016, 1 -6.

AMA Style

S.M. Rakiul Islam, Shawn Maxwell, Kamal Hossain, Sung-Yeul Park, Sungmin Park. Reactive power distribution strategy using power factor correction converters for smart home application. 2016 IEEE Energy Conversion Congress and Exposition (ECCE). 2016; ():1-6.

Chicago/Turabian Style

S.M. Rakiul Islam; Shawn Maxwell; Kamal Hossain; Sung-Yeul Park; Sungmin Park. 2016. "Reactive power distribution strategy using power factor correction converters for smart home application." 2016 IEEE Energy Conversion Congress and Exposition (ECCE) , no. : 1-6.

Journal article
Published: 18 July 2016 in Energies
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In order to determine the most cost effective alternative among hardening options of power systems, the direct monetary benefits should be evaluated above all other things. Therefore, this paper presents a life-cycle cost model which describes total monetary costs experienced in annual time increments during the project with consideration for the time value of money. In addition, to minimize the risks associated with estimated cost errors due to uncertainties of input data, the stochastic input data are considered. Using the Monte Carlo method, the probabilities and cost ranges in the case studies can be predicted, in turn resulting in better decisions in the selection of hardening options which are cost effective.

ACS Style

Sungmin Park; Sung-Yeul Park; Peng Zhang; Peter Luh; Michel T. J. Rakotomavo; Camilo Serna. Comparative Life Cycle Cost Analysis of Hardening Options for Critical Loads. Energies 2016, 9, 553 .

AMA Style

Sungmin Park, Sung-Yeul Park, Peng Zhang, Peter Luh, Michel T. J. Rakotomavo, Camilo Serna. Comparative Life Cycle Cost Analysis of Hardening Options for Critical Loads. Energies. 2016; 9 (7):553.

Chicago/Turabian Style

Sungmin Park; Sung-Yeul Park; Peng Zhang; Peter Luh; Michel T. J. Rakotomavo; Camilo Serna. 2016. "Comparative Life Cycle Cost Analysis of Hardening Options for Critical Loads." Energies 9, no. 7: 553.

Conference paper
Published: 01 June 2015 in 2015 9th International Conference on Power Electronics and ECCE Asia (ICPE-ECCE Asia)
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The reactive power compensation performance of aggregated unidirectional power factor correction converters commonly found in household appliances is evaluated. Operating under supervisory command, these converters have the potential to serve as a low cost alternative to conventional reactive power compensation solutions by utilizing their available capacity for reactive power support in smartgrids and microgrids. It is demonstrated that unidirectional converters are able to support their load demand while simultaneously compensating reactive power demand elsewhere in the grid. However, as the generated reactive power increases, harmonic current content is introduced in the grid. In this case, locally available photovoltaic or vehicle-to-grid bidirectional converters capable of harmonic current compensation can serve as active power filters. A MATLAB/Simulink model is used to assess the feasibility and performance of the proposed strategy.

ACS Style

Joshua Ivaldi; Sungmin Park; Sung-Yeul Park; Ivaldi Joshua. Integration strategy for bidirectional and unidirectional converters aiming for zero power pollution in residential applications. 2015 9th International Conference on Power Electronics and ECCE Asia (ICPE-ECCE Asia) 2015, 1756 -1761.

AMA Style

Joshua Ivaldi, Sungmin Park, Sung-Yeul Park, Ivaldi Joshua. Integration strategy for bidirectional and unidirectional converters aiming for zero power pollution in residential applications. 2015 9th International Conference on Power Electronics and ECCE Asia (ICPE-ECCE Asia). 2015; ():1756-1761.

Chicago/Turabian Style

Joshua Ivaldi; Sungmin Park; Sung-Yeul Park; Ivaldi Joshua. 2015. "Integration strategy for bidirectional and unidirectional converters aiming for zero power pollution in residential applications." 2015 9th International Conference on Power Electronics and ECCE Asia (ICPE-ECCE Asia) , no. : 1756-1761.

Journal article
Published: 20 May 2015 in Journal of Power Electronics
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ACS Style

Sungmin Park; Sung-Yeul Park; Ali M. Bazzi. Input Impedance and Current Feedforward Control of Single-Phase Boost PFC Converters. Journal of Power Electronics 2015, 15, 577 -586.

AMA Style

Sungmin Park, Sung-Yeul Park, Ali M. Bazzi. Input Impedance and Current Feedforward Control of Single-Phase Boost PFC Converters. Journal of Power Electronics. 2015; 15 (3):577-586.

Chicago/Turabian Style

Sungmin Park; Sung-Yeul Park; Ali M. Bazzi. 2015. "Input Impedance and Current Feedforward Control of Single-Phase Boost PFC Converters." Journal of Power Electronics 15, no. 3: 577-586.